Defensive publication

ABSTRACT

A POLYMERIC COMPOSITION IS PROVIDED COMPRISING A THERMOPLASTIC POLYMER AND A PHOTOSENSITIZING PRODEGRANT, IN WHICH THE PHOTOSENTIZING PRODEGRANDANT IS A SALT OF IRON II OR III OF: (A) AN ORGANIC CARBOXYLIC ACID HAVING 3-30 CARBON ATOMS IN THE MOLECLUE OR SULPHONIC ACIDS; OR (B) AN ORGANIC HALOGEN ACID, OXYHALOGEN ACID; OR (C) AN OXYACID OF SULPHUR, BORON,PHOSPHOROUS OR SILICON; OR (D) AN ACID DERIVED FROM AN OXIDE OF A METAL; OR (E) CYANIC, THIOCYANIC, NITROUS OR HYPONITROUS ACIDS OR COMPOUNDS IN WHICH THE ANIONS OF THE FOREGOING SALTS ARE PARTIALLY REPLACED BY HYDROXYL, ALKOXY OR ARYLOXY GROUPS, OR AN IONIC IRON COMPLEX DERIVED FROM ONE OF THE FOREGONG SALTS OR COMPOUNDS AND AN ELECTRICALLY-NUETRAL LIGAND. THE PREFERRED POLYMERS ARE HOMOPOLYMERS OF ETHYLENE, PROPLENE, BUTENE-1,4-METHYL PENTENE-1 AND STYRENE AND COPOLYMERS OF THESE WITH ONE ONOTHER AND/ OR WITH OTHER *-OLEFINES. THE PREFERRED PHOTOSENTIZING PRODEGRADANTS ARE FERRIC STEARATE, FERROUS CHLORIDE TETRAHYDATE, FERROUS CHLORIDE AND FERRIC CARBOXYLATES OF 3 TO 30 CARBONS ATOMS.

DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice oi Dec. 16, 1969, 869 0.6. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally died. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED APRIL 23, 197 1 921 O.Gr. 1307 T921326 PHDTOSENSITIZEI) POLYMER COMPOSITIONS Derek Samuel Brackman, Stanmore, England, assignor to Imperial Chemical Industries Limited, London, England Filed July 9, 1973, Ser. No. 377,191 Continuation of abandoned application Ser. No. 220,461, Jan. 25, 1972. This application July 9, 1973, Ser. No.

Int. Cl. (308i 27/28 US. Cl. 26093.7 No Drawing. 12 Pages Specification A polymeric composition is provided comprising a thermoplastic polymer and a photosensitizing prodegradant, in which the photosensitizing prodegradant is a salt of iron II or III of:

(a) an organic carboxylic acid having 3-30 carbon atoms in the molecule or sulphonic acids; or (b) an inorganic halogen acid, oxyhalogen acid; or (c) an oxyacid of sulphur, boron, phosphorus or silicon; or

(d) an acid derived from an oxide of a metal; or

(e) cyanic, thiocyanic, nitrous or hyponitrous acids; or compounds in which the anions of the foregoing salts are partially replaced by hydroxyl, alkoxy or aryloxy groups, or an ionic iron complex derived from one of the foregoing salts or compounds and an electrically-neutral ligand. The preferred polymers are homopolymers of ethylene, propylene, butene-lA-methyl pentene-l and styrene and copolymers of these with one another and/ or with other a-olefines. The preferred photosensitizing prodegradants are ferric stearate, ferrous chloride tetrahydate, ferrous chloride and ferric carboxylates of 3 to 30 carbon atoms. 

